Tailored ozone activation on geometrical-site-dependent cobalt with selective coordination

Shenning Liu, Yuxian Wang (), Ya Liu, Peihan Chen, Tao Kong, Xiaoguang Duan, Chunmao Chen (), Hongqi Sun () and Shaobin Wang
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Shenning Liu: China University of Petroleum-Beijing
Yuxian Wang: China University of Petroleum-Beijing
Ya Liu: The University of Adelaide
Peihan Chen: China University of Petroleum-Beijing
Tao Kong: China University of Petroleum-Beijing
Xiaoguang Duan: The University of Adelaide
Chunmao Chen: China University of Petroleum-Beijing
Hongqi Sun: The University of Western Australia
Shaobin Wang: The University of Adelaide

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Cobalt-containing spinel oxides are promising platforms to fine-tune the intrinsic activity/selectivity of their geometric sites in catalysis. However, the role of tetrahedrally occupied Co2+ (Co2+Td) and Co3+ in an octahedral site (Co3+Oh) in controlling the catalytic activity remains controversial. Herein, we investigated a geometrical-site-dependent catalytic activation of ozone respectively on the Co2+Td and Co3+Oh sites. The same exposure of [111] crystal facet is achieved by substituting those undesired sites with catalytically inactive cations. The highly spin-polarized Co2+Td sites invoke strong orbital interactions and intensive electron transfer with the adsorbed O3 and become the active sites for selectively producing surface-bound hydroxyl radicals (•OH) and avoiding the formation of unfavorable singlet oxygen (1O2), resulting in a 17.6-fold increase in turnover frequency (TOF). This work enlightens the spin-polarized electronic states into regulating the reaction thermodynamics in transition metal oxide-induced catalysis and envisages the practical application potentials of geometric site engineered spinel oxides.

Date: 2025
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DOI: 10.1038/s41467-025-61181-7

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